// Copyright 2021 Matrix Origin
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package sm

import "sync/atomic"

type ClosedState struct {
	closed int32
}

func (s *ClosedState) TryClose() bool {
	return atomic.CompareAndSwapInt32(&s.closed, int32(0), int32(1))
}

func (s *ClosedState) IsClosed() bool {
	return atomic.LoadInt32(&s.closed) == int32(1)
}
